Telephone Hotline

If you have a question about your garden, call our hotline, at 301-590-9650. The schedule for the hotline is: Tuesdays, 10 am -1 pm. You can also bring a plant sample to our Derwood office and have it diagnosed in person.



We can help diagnose pest or disease problems in your landscape, or on your houseplants. If your lawn doesn't look its best, we can offer assistance. Do you have problems with deer in your neighborhood? We can help. Did your azaleas bloom poorly this year? Give us a ring. Would you like a recommendation for a shrub that does well in shade? We can provide you with a list of possibilities.

Diagnosing problems over the phone can sometimes be difficult. If you are able to take a sample of your pest or disease problem, you may want to visit one of our plant clinics.

Whatever your gardening problem is, Master Gardeners are here to assist you at no cost.

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